Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

external/cecil-legacy/Mono.Cecil/DefaultAssemblyResolver.cs

@@ -0,0 +1,70 @@
+//
+// DefaultAssemblyResolver.cs
+//
+// Author:
+//   Jb Evain (jbevain@gmail.com)
+//
+// Copyright (c) 2008 - 2011 Jb Evain
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using System.Collections.Generic;
+
+namespace Mono.Cecil {
+
+	public class DefaultAssemblyResolver : BaseAssemblyResolver {
+
+		readonly IDictionary<string, AssemblyDefinition> cache;
+
+		public DefaultAssemblyResolver ()
+		{
+			cache = new Dictionary<string, AssemblyDefinition> (StringComparer.Ordinal);
+		}
+
+		public override AssemblyDefinition Resolve (AssemblyNameReference name)
+		{
+			if (name == null)
+				throw new ArgumentNullException ("name");
+
+			AssemblyDefinition assembly;
+			if (cache.TryGetValue (name.FullName, out assembly))
+				return assembly;
+
+			assembly = base.Resolve (name);
+			cache [name.FullName] = assembly;
+
+			return assembly;
+		}
+
+		protected void RegisterAssembly (AssemblyDefinition assembly)
+		{
+			if (assembly == null)
+				throw new ArgumentNullException ("assembly");
+
+			var name = assembly.Name.FullName;
+			if (cache.ContainsKey (name))
+				return;
+
+			cache [name] = assembly;
+		}
+	}
+}